Improvement in steam-generators



UNITED STATES PATENT OFFICE.

ESAU ROVING, OF PARKERSBURG, WEST VIRGINIA.

IMPROVEMENT IN STEAM-GENERATORS.

Specification foriningpart of Letters Patent No. 58,678, dated October9, 1866; anicdatcd September L3, 1866.

To all whom it may concern:

Be it known that I, ESAU ROWING, of Parkersburg, in the county of Woodand State of W'est Virginia, have invented a new and useful Improvementin Steam-Boilers; and I do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theannexed drawings, making a part of this specification, in which* Figurel is alongitudinal section taken horizontally through about the centerof a highpressure steam-boiler constructed according to my invention.Fig. 2is a longitudinal view taken vertically through the same.

Similar letters of reference indicate corresponding parts in both gures.

The object of this invention is to construct a steam-boiler capable ofresisting a higher pressure than can be borne by steam-boilers asheretofore commonly constructed.

It consists in constructing the boiler of a series of inclined tubeshaving one end closed and situated above the nre-place, and the otherend opening into a transverse tube of larger diameter, in which thesteam generated in the said inclined tubes is collected.

To enable those skilled in the art to understand the construction andoperation otl my invention, I will proceed to describe itwith referenceto the drawings.

Any suitable number of wrought-iron tubes a are placed in the furnaceparallel with each other and a suitable distance apart. They extendnearly or quite the whole length of the furnace, immediately below thelire-brick arch b, which forms the top of the same, and the brickworksides of the furnace are close to the two outside tubes of the series.-

The front ends ofthe tubes a project through the front of the furnace,above the re-door c, and have wrought-iron tian ges d screwed upon them,to which, having been properly faced, the wroughtiron covers c arebolted.

The rear ends of the tubes a communicate with the transverse tube f,which is of a larger diameter than the tubes a, and has one side madethicker, in order that the tubes a may `be screwed therein.

The ends of the tube f project beyond the briclrwork of the furnace, andare provided with wrought-iron ilanges g, screwed on and faced, and tothese iianges are bolted the wrought or cast iron covers h, a stay-rod,fi, passing through the center and being rmly bolted to each cover.

One end of the tube f projects through the brick-work more than theother, and it is proposed to affix the water-gage to the cover at thisend, and also to have a safety-valve at the Lipper side, and a blow-outpipe at the lower side, of the pipe at the same end.

The steam may be taken from the top of the tube fat the center or anyother convenient part.

On referring to Fig. 2, it will be observed that the tubes c areslightly inclined, their front ends being the lowest, so that thewaterlevel with regard to the tubes shall assume the position shown bythe red line in the said figure, in order that when the transverse tubef is half full of water the lower ends of the tube a above the fireshall be full of water, with a graduali y-increasin g space all alongthe tubes for the steam, as it is formed, to escape to the larger ortransverse tubef.

By this construction of steam-boilers the steam is raised very rapidly,and the boiler itselfis capable of bearing at least tive times thepressure that boilers of the ordinary construction will resist. At thesame time it is very simple and inexpensive. V

In some instances I propose to double this arrangement-that is, to havetwo sets of longitudinal inclined tubes, both connected at oppositesides to the same transverse tube j', and to have a fire-place at eachend of the furnace, the transverse tube being in the center, midwaybetween the two tires. In other cases l would employ two or more sets ofthe inclined tubes, one set above another, and but one furnace.,situated underneath their lower ends, to heat them.

Having thus described the nature and object of my invention, togetherwith the manner in which the same is or may be carried into practicaleifect, I would remark that I do not claim a steam-boiler consisting ofa series of tubes in itself, but

What I claim as new, and desire to secure by Letters Patent, is-

So arranging a series of inclined tubes, a, with reference to the drum fthat the waterline intersecting the drum at its center' shall leave agradually-increasin g steamspace in the tubes a from the lower orfurnace end of said tubes to the point of their junction with the drum,substantially as and for the purposes setforth.

ESAU ROWING. Witnesses A. M. Moss, W. H. EARNEST.

